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20243320 = 235506083
BaseRepresentation
bin100110100111…
…0001101111000
31102002110121121
41031032031320
520140241240
62001515024
7334031266
oct115161570
942073547
1020243320
1110477119
126942a74
13426a0c6
14298d436
151b9d04a
hex134e378

20243320 has 16 divisors (see below), whose sum is σ = 45547560. Its totient is φ = 8097312.

The previous prime is 20243309. The next prime is 20243339. The reversal of 20243320 is 2334202.

It is a junction number, because it is equal to n+sod(n) for n = 20243294 and 20243303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253002 + ... + 253081.

Almost surely, 220243320 is an apocalyptic number.

20243320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20243320 is an abundant number, since it is smaller than the sum of its proper divisors (25304240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20243320 is a wasteful number, since it uses less digits than its factorization.

20243320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506094 (or 506090 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20243320 is about 4499.2577165573. The cubic root of 20243320 is about 272.5381143556.

Adding to 20243320 its reverse (2334202), we get a palindrome (22577522).

The spelling of 20243320 in words is "twenty million, two hundred forty-three thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 506083 1012166 2024332 2530415 4048664 5060830 10121660 20243320